Quasars and Cosmology

The SDSS DR15 has images and spectra for about 4,500 quasars - far more than had ever
been seen previously. This large sample allows complex studies about quasars that were never possible before.
The huge quasar and galaxy samples that the SDSS offers also allows detailed studies of cosmology.

Click on one of the questions below to see a guide. Open the tools through the links provided in the
guides, and follow along as you read.